Oral appliance device



FIG. 1 is a front perspective view of an oral appliance device showing our new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a rear elevation thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevation thereof; and,

FIG. 7 is a left side elevation thereof. 

The ornamental design for an oral appliance device, as shown and described. 